Grinding-mill cleaner.



- PATENTBD MAY 19,1903.

H. D. PHILLIPS. GRINDING MILL CLEANER. APPLICATION IILEDYJULY 29, 1901.

no MODEL.

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No. 728,289. PATENTED MAY- 19, 1903'. H. 1). PHILLIPS. v GRINDING MILLULEANER. i

APPLICATION FILED JULY 29, I901 n4: "cams vrrzns cu, PNOYO-LITNLL. msumarou, o. c.

' ent cleaning means. 7 Fig. 2 is a rear elevation? -of such accumulation. signed to arrange for'cleansing the shellwith- Patented May 19, 1903.

PATENT OFFrcE.

HIRAM D. PHI LLllS, oFoHArTAnooGA, TENNESSEE.

1 e Rmomer MILL CLE ER;

w SPEClZFICATION forming ate Letters ratent No. 72 ,289, dated May 1e, 19031 Application filed July 29,1901. Serial No. 70,133. on modelt) v t To aZZ whom it may concern.-

Be it known'that I, HIRAM D. PHIL IPS; a citizen of the United States, residing at Chat-1 tanooga, in the county of Hamilton and State. of Tennessee, have invented a new and use-f ful Grinding-Mill Gleaner, of which the following is a specification;

This invention relates to grinding-mills, and particularly to that class of mills which are employed for grindingspi'ce'and the like, and has for its object to provide for conveniently cleansing the grinding-shell of-the accumulation of oil and oily matter which escapes from the products under treatment, and thereby to prevent the toothed or corrugated shell from becoming smooth'by reason It is furthermore deout stopping the mill and also to provide for applying the present invention to mills al-. ready constructed and to connect the same to some working pertion'of the mill for oper-jg ating the cleansing'means'during the runningofthemilL' With these and other objects in View. th el present invention consists in the combina-l tion and arrangement of parts, as will be hereinafter more fully described, shownin the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, propor tion, size, and minor'details may, be made within the scope of -the'claims without de-g parting from the spirit or sacrificing anyv of the advantages of the invention. 4

In the drawings, Figure l is a side eleva-I tion of a grinding-mill equipped lwiththepres-g thereof, parts being broken away to show an; operative connection with the grinding-shelh,

' Fig. 3 is a top plan view thereof. Fig. 4 is acen-g tralvertical sectional view taken through the grinding-shell andadjace'nt'parts, Fig. 5 is a detail plan section on the line 5 50f Fig." 1. Fig. ,6 is'a' detail sectional view of a portion of the grinding-shell. Fig. 7 is adetail View of the'pi voted lever for transmitting movement to the shell-turning pawl.

Like characters of reference designate corresponding parts in all of the figures of'the' drawings.

To adequately illustrate the application and operation ofthe present invention, there has been shown a common form of grindingmill, consisting generally in a bed 1 for the support of a power-shaft 2, which has its outer end projected centrally through a cylindrical casing 3, to which the products to be ground are fed through the hopper 4 and the throat portion 5. As best shown in Fig. 4, the back of the casing is provided with a central opening 6 for the reception of the products, and fixed within the casing is the grindingshell 7, which is provided upon its inner side with transversecorrugations or teeth 8. The shell or ring is open at opposite ends, and cooperating with the inner corrugated margin thereof is a plurality of beaters, (not shown,) which are mounted upon the shaft, which extends centrally through the shell. The ground products are designed to pass outwardly from the shellandthrough the substantially conical chute or discharge member 9. --The outer side of theshell'is partly closed by a circular plate 10, carried by thexshaft and; rotatable in diameter than the shell or ring, and thereby forming a marginal discharge-opening. {Above the shell thereismounted a bladed rotatable tailings cross-valve 11,'Whiich directs'the tailings to the throat and thence again to the shell.' Thisjvalve is mounted upon a shaft 12,.projecte'd externally of. the throat andin operative relation to the powershaft," 'such- "relation, however, not being shown. 1 in 4 In carrying out.thepresentinvention it is first designed to provide for scraping the corrugations of the shell to clean therefrom the accumulation from the productsifieated-as, *for instance, by means of anIendwise-movable scraping 'rod or punch 13, (best ,indicated in Fig-15,) mountedtto pass through a perforation-14,formed in the back of the mill-casing, so that thebeveledinn'er end of the rod may scrape the '.-respective..corrugations when said rod' is moved inwardly. This rod is mounted in a tubular'casing 15, projected from the back of the mill casing, the outer end of the rod being projected beyond said casing and carrying a marginal collar or shoulder 16. A helical spring 17 embraces the tubular casing and rod and bears in opg posite directions against the casingand the .75 i therewith, the plate being slightly. smaller collar to shoot the rod outwardly after it has been forced forwardly in its scraping operation. For the operation of the cleaning-rod there is provided a lever 18, located above the rod and in rear of the mill-casing, said lever being fulcrumed intermediate of its ends upon a rearwardly-directed arm 19 of a bracket 20, applied to the exterior upper portion of the mill-casing. A substantially horizontal link 2L is pivotally connected to the lower end of the lever, as at 22, and its outer end has a lateral and downwardly-offset eye or loop 23 loosely embracing the outer end portion of the cleaning-rod and in rearof the collar thereof, there being a helical spring 24 interposed between the eye and the collar, so that should the cleaning-rod strike a tooth instead of entering a corrugation in the shell there will be no forward movement of the rod, as the movement of the link will be taken up by the spring 24. At the upper end of the lever there is provided an antifriction-roller 25, which is in operative relation to a cam 26, secured to the adjacent portion of the tailings-valve shaft 12, so as to operate the cleaning-rod once at each rotation of the shaft. In order that the cleaning-rod may have access to all of the corrugations of the shell, it is designed to rotate the latter with respect to the rate of operation of the cleaning-rod by means of a ratchet mechanism in operative relation to the tailings-valve shaft. To carry out this object, there is provided a substantially horizontal lever 27, which is fulcrumed intermediate of its ends upon an arm 28 of the bracket 20, with its inner end provided with an antifriction-roller 29 in operative relation to the separate cam 30, mounted upon the shaft 12. From the outer end of this lever there is loosely hung a ratchetpawl 31, which has its hooked lower end working in a vertical slot 32, formed in the adjacent marginal edge of the mill-casing, so as to be in operative relation to a marginal series of ratchet-teeth 33, formed in the intermediate portion of the exterior of the grinding-shell, whereby the latter is designed to be rotated to bring one corrugation at a time in alinement with the opening in the back of the mill-casing and the cleaning-rod. A weight 34 is adjustably carried upon a lateral arm 35, projected outwardly from the ratchet pawl or bar, so as to maintain the latter in engagement with the ratchet-teeth of the shell. Ordinarily the shell does not turn within the casing, which it fits rather snugly, and to prevent lateral displacement by the movement of the shell the latter is also provided with an external marginal groove or way 36 for the reception of a plurality of projections 37, carried by the casing and preferably formed by headed screws piercing the casing.

It will be understood from the foregoing description that the plate ordisk 10 is designed to operate as a gage to control the area of the discharge-opening between its periphery and the wall of the cone, and thus regulate the degree of fineness to which the material is ground, and in order to provide for adjustment axially of the cone it is preferred to provide said disk with a stem 40, fitted in a clampingcollar 41 in the center of the cone, said collar having adjusting devices 42 consisting of bolts and engaging nuts or the equivalent thereof. Upon loosening the bolts the stem may be adjusted inward or outward to vary the position of the disk.

Referring particularly to Fig. 4, it will be apparent that the interior of the conical discharge member 9 is likely to collect the oily matter of the products treated, and in order to maintain this surface free from such accumulations and at the same time to prevent choking of the dischargeopening between the periphery of the gage-disk and the wall of the cone there is provided one or more knives 38, carried by a plate or disk 43, which is secured to and carried by the operating-shaft 2, said knives being directed outwardly from said plate or disk and operating close to the surface of the wall of the cone, but sufficiently removed therefrom to avoid unnecessary friction in operation.

Access to the failings-valve 11 may be had by way of the hinge-door 39, covering an opening formed in the front of the door portion of the casing.

In order to allow any accumulation of material which may work under the grindingshell from the interior of the mill to escape, and thus avoid choking or clogging the mechanism, it is preferred to provide one or more vent-openings 4A in the casing. The revolution of the shell has a tendency to draw the material toward these openings.

From the above description it will be seen, moreover, that the present-invention relates, essentially, to an attachment for application to mills already constructed, no material changes being requiredin connection with the fitting of the cleaning means.

What is claimed is- 1. In a grinding-mill, the combination with the runner and the normally stationary grinding member, of a cleaning device, means for causing it to traverse the furrows of said member, and means for imparting a. step-bystep rotative movement to said member.

2. In a grinding-mill, the combination with the runner and the normally stationary grinding member, of a longitudinally-movable cleaning device, means for reciprocating the same to clean successive furrows of said member, and means for imparting a step-by-step rotative movement to said grinding member to permit the access of the cleaning device to i all parts of said grinding member.

3. In a grinding-mill, the combination with the runner and the normally stationary grinding member, of a cleaning device, means for causing it to traverse the furrows of said member, ratchet-teeth on the periphery of said grinding member, and a pawl for enga ing the ratchet-teeth and moving said grinding member progressively to permit the ac cess of the cleaning device to all parts of said grinding member.

4. A cleaning attachment for the grinding member of a mill, comprising an endwise the runner and the normallystationary grinding'member, of a longitudinally'-' movable cleaning device a'daptedto traverse the fur rows of said'member, a fixed collar or shoulder on the cleaning device, a revolublecam, a pivoted lever havin gone end in engagement with the cam, a link pivotally connected tothe opposite end of said lever "and'slidably engaging the cleaning device,"a spring disposed between the link and the collar or shoulder, and meansfor impartinga step-by-step' rotative movement to the grindingmembera 6. In a grinding-mill, the combination with the runner and the normally stationary grinding member, of a longitudinallymovable cleaning-rod adapted to traverse the furrows of said member, a spring normally holding the rod out of engagement with said member, a pivoted lever,'a link connected thereto and having an eye for the reception of the rear tween the link and rod, and a cam for engaging the opposite end of said lever.

In testimony that I claim the foregoing as my own I have hereto affixed'my signature-in the presence of two-witnesses,

Witnesses: Y

J. GJTUCKER, W. H. HAMBLEN,

end of said rod,'a y-ieldingconnection "be- HIRAM. D. .PH'ILLIR sj 

